Sanctification is a process of growth, a matter of maturing into spiritual adulthood and no longer remaining as a child. It involves growing in grace, sometimes abundantly and at other times slowly and methodically. This incremental journey is about pressing on toward a goal, not yet perfect, but progressing toward perfection. God will eventually sanctify a person wholly, as He is faithful to complete this work in those He calls. While God plays a vital role, we bear responsibility to actively participate in this process of spiritual development. Through various means, including chastisement, God stimulates the growth of spiritual fruit within us. Tribulations produce perseverance, which builds character, and character fosters hope. By imitating what is good, we build upon each good deed, creating a cycle of positive growth. This process of sanctification equips us with everything good to do His will, yielding the peaceable fruit of righteousness to those who are trained by it. As we endure and actively engage in this spiritual training, we are prepared not only for service but for a deeper sharing in His holiness.

Sanctification constitutes a lifelong process of growth in spiritual maturity that begins at God's calling and continues until death. This development parallels the agricultural cycle in which planting seed marks only the start of a far more extensive sequence of cultivation, weeding, and pruning required to bring row crops, orchards, and vineyards to harvest. After God initiates the relationship, the individual functions as a junior partner who must actively tend the process by cultivating the fruits of the Holy Spirit through deliberate choices. Because character arises solely from volition rather than divine fiat, each person controls the evaluations and attitudes adopted toward life's circumstances and thereby determines whether growth continues. The same freedom of choice that permits progress also permits termination of the process through willful sin. Scripture therefore consistently employs the present participle "being sanctified" to indicate an ongoing, incremental transformation rather than an instantaneous completion at the moment of calling. God's role supplies the decisive power and the prepared paths of good works, while the human contribution, though meager, demonstrates reciprocal commitment and supplies the necessary cooperation. Without sustained cultivation the intended spiritual fruit cannot develop, just as a farmer's patient vigilance after planting determines whether the harvest materializes.

Sanctification encompasses consecration and separation as conditions in which God sets individuals apart as holy for His use, along with purification as a process that unfolds over time through moral choices and cooperation with divine help. This process requires active participation after initial justification, as believers must remove sin from their lives, avoid returning to it, and grow in righteousness by producing godly character and fruit. The Feast of Unleavened Bread illustrates these steps through the removal of leaven, the avoidance of anything leavened, and the consistent eating of unleavened bread, symbolizing a lifelong pattern of overcoming sin and putting on sincerity and truth rather than a one-time event. Such growth forms an essential element of the gospel of the Kingdom of God, which centers on reproducing divine character in sons and daughters so they may rule with Christ in an eternal government free from sin and death. Without this progressive development, justification alone leaves human nature unchanged and fails to prepare individuals for their roles in that Kingdom. Scripture emphasizes the necessity of pursuing holiness zealously, walking worthily of the calling, putting off the old man, and being renewed in the spirit of the mind to reach the measure of the stature of the fullness of Christ. God supplies the Holy Spirit to enable this work, yet the response involves steadfast labor, obedience, and service that pleases Him. This understanding rejects any view that limits the gospel to Christ's completed work and imputed righteousness alone, because it ignores the ongoing transformation required to become like God in true holiness.